2-(1,3-dioxolan-2-yl)-N-methylethanamine

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: After a solution of 1 g (2.7 mmol) of 5-(4-chloro-5-difluoromethoxy-1-methyl-1H-pyrazol-3-yl)-2,4-dichlorobenzoic acid and 0.66 g (4.1 mmol) of 1,1-carbonyldiimidazole had been stirred for 1 hour in 20 ml of tetrahydrofuran, 0.55 g (4.1 mmol) of N-[2-(1,3-dioxolan-2-yl)-ethyl]-N-methylamine were added. The mixture was subsequently stirred for a further 16 hours at approximately 20° C. The reaction mixture was then concentrated. The crude product was purified by chromatography on silica gel (eluent: hexane/ethyl acetate=1:1). Yield: 0.4 g. The reaction mixture was then concentrated The crude product was purified by chromatography on silica gel (eluent: hexane/ethyl acetate=1:1)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Prepared as described for N-({6-[(3-fluorophenyl)sulfonyl]-1,2,3,4-tetrahydro[1]benzofuro[2,3-c]pyridin-1-yl}methyl)acetamide using tert-butyl (2-{5-[(3-fluorophenyl)sulfonyl]-1-benzofuran-3-yl}ethyl)carbamate and N-(2-[1,3]dioxolan-2-yl-ethyl)-methyl-acetamide, which was prepared from (2-[1,3]dioxolan-2-yl-ethyl)-methyl-amine and acetic anhydride. MS m/z 431 [M+H]+. Prepared